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Service bulletins for the 2018 Cadillac CTS

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

1149 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

By topic

Only bulletins with component: Engine are shown. Show all

Bulletins, newest first
16-NA-2222022-10-07. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin provides information on Engine Concerns that could result from lack of scheduled maintenance, improper service or aftermarket calibrations.
00-06-01-026P2022-09-30. Service bulletin. ENGINE AND ENGINE COOLING. This service bulletin provides information on replacing the intake manifold when the engine is replaced after severe internal engine damage.
22-NA-1762022-09-19. Service bulletin. POWER TRAIN; ENGINE AND ENGINE COOLING. This technical bulletin provides information on a possible bolt and guide pin that may be missing from the control valve which will need to be installed to correct the repair.
20-NA-0652022-09-07. Service bulletin. ENGINE AND ENGINE COOLING. This bulletin provides information on tools available to find an intake vacuum leak or exhaust leak to correct a condition of MIL Illuminated with Multiple Fuel Trim and/or Oxygen Sensor Codes Set.
19-NA-0442022-08-29. Service bulletin. ENGINE AND ENGINE COOLING; FUEL SYSTEM, GASOLINE. This service bulletin provides information on the cold start control system in DI engines to reduce cold start emissions and improve fuel economy.
18-NA-2912022-08-03. Service bulletin. ENGINE AND ENGINE COOLING. This service bulletin provides a repair procedure to correct customer concerns of Reduced Performance, Reduced Power, Engine Misfire, Malfunction Indicator Lamp (MIL) Illuminated.
PIP5212D2022-07-25. Service bulletin. ENGINE AND ENGINE COOLING. This Preliminary Information communication provides information to the technician about vehicles that have run hot and or has a tick noise. Technician should inspect the head gaskets to ensure are not installed backwards. Technician should replace the head gasket if they are found installed backwards.
12-01-37-001F2022-07-12. Service bulletin. EQUIPMENT; ENGINE AND ENGINE COOLING; VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM. This service bulletin provides information to dealership personnel on a new refrigerant (R1234yf) for A/C service.
22-NA-0092022-07-01. Service bulletin. ENGINE AND ENGINE COOLING. This service bulletin provides service information on new torque specification and installation procedure for ACDelco Spin-On Oil Filters.
21-NA-0432022-06-02. Service bulletin. FUEL SYSTEM, GASOLINE; SERVICE BRAKES; ENGINE AND ENGINE COOLING; FUEL SYSTEM, DIESEL; WHEELS. This informational bulletin advises the dealers to maintain the vehicle stock on hand by doing a full inspection on the vehicles before being sold (prepping) to the customer.
14-06-04-004H2022-05-31. Service bulletin. ENGINE AND ENGINE COOLING. This informational bulletin explains the normal noises an engine may make when the ambient temperature outside is cold or the vehicle has sat for a few hours.
22NA0092022-05-31. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION:FILTER/SCREEN. This service bulletin provides service information on new torque specification and installation procedure for ACDelco Spin-On Oil Filters.
18NA0732022-05-31. Service bulletin. ENGINE. This service bulletin provides graphics, information and guidelines for engine component wear to assist service personnel as a guideline to perform necessary engine repairs and prevent unnecessary engine replacement.
16NA2222022-05-31. Service bulletin. ENGINE AND ENGINE COOLING:ENGINE:OIL/LUBRICATION:FILTER/SCREEN; UNKNOWN OR OTHER. This bulletin provides information on Engine Concerns that could result from lack of scheduled maintenance, improper service or aftermarket calibrations.
20NA1662022-05-31. Service bulletin. ENGINE AND ENGINE COOLING; ENGINE AND ENGINE COOLING:COOLING SYSTEM:HOSES/LINES/PIPING/FITTINGS. This informational bulletin advises the technician of possible coolant entering the areas of the engine, either through failed parts or defects in the castings, that may be the cause of the concerns related to the MIL or the engine running rough.
PIP5790B2022-05-16. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING. This Preliminary information communicates a corrosion, coolant / engine oil contamination concern of the terminals located in the ECM connectors. This document is an aide for technicians to diagnose and locate a resistance concern associated with these terminals. This condition can set various trouble codes and illuminate the MIL, make the engine stall or have a crank no start condition.
18-NA-1152022-05-11. Service bulletin. ENGINE AND ENGINE COOLING. This service bulletin provides inspection/diagnosis/correction information on a cold start misfire and/or rough idle and DTC P0300 that may also be set.
12-00-89-003B2022-05-10. Service bulletin. EQUIPMENT:ELECTRICAL; ENGINE. This service bulletin provides policy information on warranty administration guidelines for multiple repairs with independent causes (GM Canada Dealers Only).
22-NA-0742022-04-06. Service bulletin. ENGINE AND ENGINE COOLING. This service bulletin provides service information to technicians on guidelines to replace Oil Cooler, Oil Cooler Lines and Oil Tank if the engine was replaced where large amounts of debris has flowed throughout the oiling system.
15-06-01-002L2022-04-05. Service bulletin. ENGINE AND ENGINE COOLING. This service bulletin provides a procedure to repair the valve lifter oil manifold and/or lifters to correct the customers concern of engine misfire, ticking noise and/or MIL Illuminated.
22-NA-0092022-04-05. Service bulletin. ENGINE AND ENGINE COOLING. This service bulletin provides service information on new torque specification and installation procedure for ACDelco Spin-On Oil Filters.
21-NA-0362022-03-30. Service bulletin. ELECTRICAL SYSTEM; ENGINE AND ENGINE COOLING; EQUIPMENT. This service bulletin advises the technician of a diagnostic test for a possible issue with a damaged OCV solenoid that may cause an oil leak and misfire, illuminating the MIL and setting DTCs P0300, P0302 and/or P0305.
18-NA-2462022-03-24. Service bulletin. ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. This service bulletin provides repair procedures, depending on model year, to correct a customer concern of a Malfunction Indicator Lamp (MIL) Illuminated with DTC P0172, P06DE and/or P0521 Set.
22-NA-0472022-03-18. Service bulletin. ENGINE AND ENGINE COOLING. Information bulletin explains a possible coolant leak coming from the cylinder head bolt areas.
PIP5632F2022-02-14. Service bulletin. ENGINE. This Preliminary Information communication provides information to the technician that General Motors Technical Assistance Center may ask for Global Diagnostic System 2 Session Log. Technician will need use Global Diagnostic System 2 to send the session logs to General Motors Technical Assistance Center for further assistance on the vehicle in question.

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.